Add tests with pytest and add github CI action. #3

	name: CI

	on:
	push:
	branches:
	- main
	tags: ['*']
	pull_request:
	workflow_dispatch:

	jobs:
	test:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v5
	- uses: actions/setup-python@v5
	with:
	python-version: '3.11'
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -e .[test]
	- name: Test with pytest
	run: \|
	pytest metoppy/tests --cov=metoppy --cov-report=xml

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